FR2461049A1 - TWO-DIMENSIONAL KNITTING DEVICE AND METHOD WITH OSCILLATING WIRE GUIDE IN RELATION TO THE AXIS OF A FRAME ROD - Google Patents

Abstract

THE KNITTING DEVICE INCLUDES AT LEAST ONE THREAD GUIDE 25 FOR A WEFT THREAD, AND ACTUATION MEANS FOR OSCILLATING THIS THREAD GUIDE IN RELATION TO THE AXIS 29 OF A WEFT ROD 21, VIA THE INTERMEDIATE OF A MOBILE 53 RETURN UNIT IN A PLANE PARALLEL TO THE OSCILLATION AXIS 29, AND OF A CRANK 51 WHICH CAN PIVOT RELATIVE TO AXIS 29, WITHOUT SLIDING, AND WHICH IS CONNECTED TO THE WIRE GUIDE 25 THE RETURN ORGAN 53 IS CONNECTED TO THE CRANK 51 BY A LINKAGE 61, THE ENDS OF WHICH HAVE ARTICULATIONS 63, 65 AT TWO DEGREES OF FREEDOM. THE TWO ARTICULATIONS 63, 65 DEFINE A RIGHT 67, OBLIQUE AND OFFSET WITH RESPECT TO THE OSCILLATION AXIS 29. UNDER THE ACTION OF THE BACK AND BACK MOVEMENTS OF THE RETURN UNIT 53, THE TRANSMISSION LINKAGE CONTROLS ALTERNATE PIVOTS OF THE CRANK 51. APPLICATION TO FLAT KNITTING MACHINES, TO EASILY REALIZE VARIOUS PATTERNS, BY MEANS OF WEFT THREADS ARRANGED IN LOOPS IN VARIOUS MANNER.

Description

The present invention relates to a device for

  knitting, for a machine for making articles

  two-dimensional textile fabrics, such as a weft knitting machine, or a knitting machine with disguised knitting. The invention also relates to a machine equipped with such a knitting device, as well as the method

to control this device.

  We know a knitting machine in weft

  kind in question, according to the application published in

  Germany DE-OS 27 58 421. This machine comprises at least

  a weft rod carrying a thread guide and mounted to

  smooth by its two ends in a support. This rod is actuated by a rocker arm mounted on the frame of the machine, and controlled by a rotating cam plate, to cause alternating movements of sliding

  the weft rod along its longitudinal axis. This

  canism makes it possible to pass transversely on the hook needles, and on the chalk threads, a weft yarn entrained by the guide wire, to incorporate it into the meshes formed by the various chalk threads, in order to connect these meshes between them in the transverse direction. In addition, supports with each of

  weft rods they carry are animated by a movement

  back and forth perpendicular to the longitudinal axis of the weft rods, and substantially perpendicular to

hook needles.

  In order to produce knitted articles having edges or fringes at the selvedge, the yarn guide associated with the weft yarn should also be driven in an oscillating movement relative to the axis of the yarn.

  the weft rod that carries it. Now such an oscil-

  lant is not provided by the German application DE-OS 27 58 421 which proposes the known knitting machine,

  mentioned above, to knit in weft.

  The work of R. BUttner, published by Eugen G. Leuze, publisher of Saulgau, Württemberg, under the title "La

  machine with crocheted knitting hooks "(Die Hfkelga-

  lonmaschine), provides for a machine of this kind,

  as a device to form loops, due to a

  alternating pivoting of an action frame rod

  born by a rod and crank device whose axis of rotation is parallel to the weft rod. The connecting rod

  control is associated with a push rod mounted to

  smooth in the support of the weft rod. The movement of the crank is transmitted by a ratchet wheel to a removable cam drum, selected according to the

  patterns of the knitted article to achieve. These cams

  a rocker arm mounted on the support, along an axis parallel to the axis of oscillation of the weft rod,

  and which cooperates with another oscillating lever, to com-

  order alternating pivoting of the rod that carries the wire guide. But this known device for making loops has several disadvantages. Its mechanical complexity allows only reduced working speeds, and allows to knit only relatively simple models, because it is not possible to give the cam drum, mounted on the oscillating support, dimensions

  as important as it should be for

  replicas. In addition, this known device does not allow, to control the oscillations of the guide wire, to use a cam drum, or a camshaft, similar to 1 '

  cam member for controlling the slidings

stained with each weft rod.

  According to the work already mentioned, entitled

  "The machine with crochet hooks"

  another machine with a cut-off weft

  smoothing which is attached a stirrup which defines a

  contoured curve, followed by a roller of a trans-

  versal to the oscillating rod to be ordered, and associated with

  a return spring. The weft stem attached to the

  Profile sorting can be slidably controlled via a Jacquard system. This sliding produces, then through the profiled stirrup and the associated arm, the pivoting of the oscillating rod to be controlled, which is slidably locked. But this other machine knitting hooks stripes has a disadvantage, because the oscillating rod can not slide. In addition, one of the weft rods, that which is provided with the profiled stirrup, serves only to transform an alternating sliding movement into an oscillating movement. However, in particular for reasons of

  in general, one can not predict in general

  knitted crochet hooks a relatively small number of weft stems, of the order of six weft stems for example. And the possibilities of

  machine, to knit more or less complicated patterns

  therefore, are severely limited if one of the stems of

  frame is locked in sliding, and can only

  oscillating, while another weft rod serves only to control these oscillations. In addition, the known device for making loops with a wire of

  frame does not allow to vary the amplitude of the bones

  at will, to observe a pre-school program

  This also limits the possibilities of using the machine to knit various patterns. Moreover, this known device only makes it possible to obtain speeds

working poorly.

  According to German Patent No. 542,184, it is

  There is a device for controlling the oscillations of a rod carrying a wire guide in a knitting machine. This rod can pivot on bearings and carries a slide at one of its ends. It is locked in sliding by two rings, one of which carries a finger engaged in a bent slot, formed in a

  tongue attached to the slider, That-di can be controlled

  dice by chain rods of a Jacquard system. But as the slit of the tongue is bent, the movement

  axial direction of the slider and its tongue leads to a debate

  side of the finger engaged in the slot. This finger and the

  locking ring which carries it therefore constitute a

  elementary wheel, which converts the alternating sliding of the slider and its tongue, into communal oscillations.

  nicked to the rod that carries the wire guide.

  The axial movement of the slide causes not only a lateral movement of the finger engaged in the slot, but also a change in the obliqueness of the finger relative to the tongue N. The mounting of the finger in the slot must therefore have a fairly large game, even if the tongue is mounted with a possibility of

  radial adjustment relative to the rod carrying the guide-

  thread. In addition, the finger associated with the slot relates only to a single point thereof, at least in certain positions of the finger, with this drawback that can not be

  operate this mechanism only at frequencies of

  relatively low cillation, and that wear is

  intensively intense. In addition, it is necessary to limit the amplitude of the oscillations to a relatively low value, otherwise it would be necessary to increase the play of the finger in the slot. Finally, sliding blocking of the rod

  wearing the thread guide is another disadvantage.

  The object of the invention is to avoid inconveniences

  that have just been exposed, in order to achieve a

  positive knitting of the kind in question, allowing to control at high frequency, and following a complex and pre-established knitting program, the oscillations of

  a wire guide or feedback device for a thread of

  In addition, the invention aims to allow, if necessary, an alternating sliding movement of the wire guide and of the weft return member, in the direction of the axis of oscillation, without this alternating sliding being

  affected by the oscillations of the aforementioned organs.

  The invention relates to a device for a machine

  two-dimensional textile articles

  sions, such as a knitting machine in weft, or a machine with hooks knitting stripes. This device comprises at least one wire guide or a return member for a weft yarn, and actuating means for imparting oscillating movements to the precise organs.

  with respect to an axis of oscillation, through

  of a movement return organ, mobile in

  a plane parallel to the axis of oscillation, and d

  it being able to oscillate with respect to the oscillation axis, but slidably locked in the direction of this axis 7, this crank is connected to the wire guide and to the

return of the weft thread.

  According to the invention, the device described above

  finished is characterized in that the mold

  is connected by a deformable joint along several axes to a transmission rod, itself

  connected by another deformable joint following several

  two axes, crank; and that both articles

  deformable culations define an oblique straight line and offset with respect to the axis of oscillation; so that

  the transmission link turns into pivotal bearings

  the crank, the movements of back and forth movement of the organ of return, when the device

works on the machine.

  As discussed below, these provisions "-

  make it possible to produce a convenient and enduring knitting device capable of operating at a high frequency,

  using a single weft rod of the machine.

  In particular, the device according to the

  The invention provides a weft yarn on a weft knitting machine, such as a knitting machine for knitting the strips, by means of a thread guide or a return member associated with the weft yarn. , and fixed

on a weft rod.

  To control the oscillations of this stem of

  frame, the device according to the invention makes it possible to use

  be actuating means similar to those

  wind to control the alternating slides of the weft frames. These actuating means comprise for example cam chains each associated with a rocker arm whose pivot is integral with the frame of the machine, in a

  mechanical system where all cam chains

  slow on the same drum, and o all rockers have the same axis of oscillation. Depending on the type of knitting to be made, it is also possible to use rotating cam plates, or profiled hollow-groove plates, instead of cam chains or camshafts, for

operate the rockers.

  The device according to the invention can also be used on other machines used to produce two-dimensional textile articles, and in which a wire guide or a return member associated with a wire must be driven by an oscillating movement. relative to an axis,

in any predetermined way.

  According to the invention, the knitting machine is

  characterized in that it comprises a trimming device

rating as outlined above.

  Also according to the invention, the method for controlling this knitting device, for imparting oscillating movements to a thread guide or to a return member associated with a weft thread, is characterized in that the oscillating movement of the thread is controlled. wire guide and the return member via a movement transmission member movable in a parallel plane

  to the axis of oscillation; the organ of transmission of movement

  To do this, it is necessary to control a link rod to which it is associated by means of a deflectable articulation along several axes; and this link is itself associated, by another deformable articulation along several axes, with an oscillating crank, integral in rotation with the wire guide and the return member of the weft thread, but which can slide axially with respect to

these organs.

  Other features and advantages of the invention

  will still be apparent from the description of some

  embodiments, presented below as examples of

  non-limiting plies, with reference to the accompanying drawings, in which:

  Fig. 1 is a partial schematic view in pers-

  perspective of a machine with hooks for knitting the stripes, according to the invention;

  Fig. 2 is a schematic section of a device

  oscillator according to the invention for controlling a weft rod of the machine of FIG. 3 is a plan view over the

  connecting rod and elements associated with the biel-

  by ball joints in the control device of FIG. 2;

  Fig. 4 is a diagram of a device for comparing

  the reciprocating motion of a weft rod of the machine of FIG. 5 is a diagram of a control device of a mobile support; Fig. 6 is a schematic perspective view of a variant of the machine hooks knitting stripes, according to the invention; Fig. 7 is a perspective diagram of a yarn guide system, intended to engage or not a thread in a knit, according to its position of advance or withdrawal; Fig. 8 is a plan view of a blind strip; Fig. 9 is a schematic perspective view of an antenna of the weft control device; Fig. 10 is a simplified diagram, showing in perspective the frame rods of a hook machine

  knitting the stripes, including guide-wires of

  tower mounted on a swinging support rod;

  Fig. It is a simplified view, in plan

  above, a mechanism associated with the visible frame rods

  shown in Figure 10, to control the movements of

  back and forth and the oscillations of these rods.

  In the embodiment of Figure 1, the

  knitting machine in weft, more exactly called ma-

  China with crocheted knitting hooks, of which this figure

  re represents a part, comprises a turntable holder

  guilles 1, itself represented only in part,

  on which are mounted crocodile hands 3, dis-

  side-by-side and parallel to each other. The place

  The needle holder 1 is mounted on a beryl (not shown).

  machine), and mobile under the action of a

  positive actuation, to have a movement of va-and-

  is in the direction of the length of the hook needles 3. In addition, the machine comprises a support 5, on which

  are mounted son-guides 7, each presenting a pass-

  same needlehole, one thread guide 7 for each hook needle 3. The support 5 is

  movably mounted on the frame of the machine, and

  associated with actuating means, so as to

  write to each guide-thread 7 a closed trajectory around

  of the longitudinal axis of the corresponding needle 3. Lors-

  that the machine operates, each guide-wire 7 thus serves to guide a warp 9, to achieve with it

successive meshes 11.

  Two supports 13 and 15 are pivotally mounted on the frame of the machine, and each associated with a control rod in oscillation controlled by a drive mechanism, so as to each describe a circular arc when the machine operates. The axes

  of articulation of the oscillating supports 13 and 15 are

  laid in such a way that the parts of these

  visible in Figure 1 are animated by a movement

  alternately from top to bottom, substantially perpendicular to the longitudinal axes of the hook needles 3, as

indicated by the arrows 17.

  In the two oscillating supports 13 and 15, is slidably mounted at least one weft rod, movable in

  the meaning of its length. In the embodiment

  presented as an example in Figure 1, provision has been made

  two weft rods 19 and 21. The weft rod 19, at

  which is fixed a lug 23 of return wire guide, ne

  can move only in the direction of its axis when

  the machine, as indicated by the arrow 27. For

  be, the weft rod 21 which carries a tab 25 provided with a guide-wire sleeve 25a can move alternately,

  both in rotation along its axis 29 constituting a

  rotatior 4 for wire guide 25, and in the longitudinal direction

  tudinal of this axis of rotation of the wire guide. These two

  Possible operations of the wire guide 25 are indicated by the

arrows 31 and 33.

  When the machine is running, a weft thread

  passes into the guide bush 25a of the guide leg

  wire 25, and the weft rod 21 is animated by a movement

  axial, back and forth, synchronized with the os-

  of the hook needles 3, guidewires 7, and supports 13 and 15, so that the weft thread

  is deposited on the meshes II during the training

  these links, in order to link them together

in the transverse direction.

  When the thread guide 25 (FIG. 1) is in extreme position, from the left side the return rod 23 associated with the weft thread 35, the thread guide 25 can pivot.

  relative to its axis of oscillation 29, so as not to

  Be behind the return rod 23, after passing in front of this rod, for the return of the weft thread. This

  pivoting of the thread guide 25 takes place between the slides

  axial elements of the wire guide, to ensure the winding of the weft thread 35 on the return claw 23, and to form

  successive loops 37,39, protruding on one of the

  res of the band constituted by the knitted columns of mesh by the machine. If we further slide the weft rod 19, to move the return claw 23 of the weft yarn, we can make loops of variable size. In the case represented by way of example in FIG. 1, the loop 37 is shorter than the loop 39. The thread guide 25 thus constitutes, with the or-

  mobile units associated with it, a device for

  rolling to achieve symmetrical loops.

  When the knitted band is finished, the loops 37, 39, can form tips or fringes, the latter being made by cutting the end of

  loops once the tape is finished.

  Of course, the machine may also include other weft son each associated with a guide wire to be able to incorporate the choice in the knitting several

  strings having different hues and / or thicknesses

  ferent. The slide movements can be controlled

  weft rods and the alternating pivoting of the weft rod 21 by means of a program system, to perform movements of the rods according to a

  predetermined program, in order to produce tri-band

listed on various grounds.

  With reference to FIGS. 2, 3, 4 and 5, an industrial embodiment will now be described.

  of the weft rod 21 and the mechanism used to

  to urge the movements. For simplicity, we did not represent

  in these figures 2, 3, 4 and 5, the other weft rod

  19 with alternating sliding movement, nor the other parts

parts of the machine.

  In the support 15 (Figure 2) is fixed a bearing sleeve 41 mounted by screwing into the support, and secured to a plate 41a projecting downwards,

  of the right side of the support 15 in FIG.

  the sleeve 41, is fitted with an intermediate bush

  43 rotatable, and having a recess

  axial 43a. In this one is slidably mounted the

  21a of the weft rod 21, to which corresponds 1 1 the pivot axis 29 of the guide 25 of the weft thread 35

(figure 1).

  It should be observed that the end 21a of the weft rod 21 is slightly thinner than the remainder of this rod, although FIG.

  this rod with the same caliber over its entire length.

  easy to simplify. The end of the sleeve 43

  left of the support 15 (Figure 2) carries a trans-

  versal 45, locked by clamping on the socket, to be

  integral in pivoting as in sliding. Similarly,

  core farther to the left of Figure 2, the weft rod 21 carries another transverse arm 47, secured to the rod in rotation and sliding, and on which is

  mounted an auxiliary rod 49, parallel to the rod of

  21 and slid in the first transverse arm

  sal 45. Thus, the weft rod 21 is secured in rotation

with the socket 43.

  From the right side of the support 15 (Figure 2), the

  the 43 carries a crank pin 51, integral with the sleeve in black

  tation and sliding. The extreme faces of the

  41 each constitute a bearing abutment for the transverse arm 45 and for the crankpin 51, so that the system constituted by the sleeve 43, the arm 45 and the

  crank pin 51, is associated with the support 15, without being able to

  smoothing relative thereto, neglecting the lights that exist in all cases, At the right end of the sleeve 43 (Figure 2) is slidably mounted a return head 53 movable in the direction of the axis 29. At this head 53 is fixed a guide rod 55 parallel to the weft rod 21, and slidably mounted in a common passage of the support 15 and the plate 41a. The guide rod prevents the deflection head 53 from rotating relative to the axis 29, and carries a spring 57 resting on the return head 53, for the

remove from support 15.

  The return head 53 is connected by an article

  ball joint 65 to a link 61 itself connected to the crank pin 51 by another ball joint 63, and

  adjustable in length thanks to its threaded ends, asso-

  lock nuts and a center sleeve 67 aligned on the centers of the two ball joints

  63, 65. The axis of the rod 61 thus defined is orien-

  side oblique and offset in height with respect to the axis dt

  oscillation 29 of the weft thread guide.

  A rocker 71, articulated on a part 75 of

  frame of the machine, on an axis of oscillation 73

  - Dicular to the axis of oscillation 29 of the weft thread guide, carries a roller 77 bearing on an anterior face of the deflection head 53, whose plane is perpendicular to 1 '

  oscillation axis 29 of the thread guide. Another roller 79, so-

  lid of the rocker arm 71, is supported on a cam cat 81, wound on a drum 83 mounted-so

  swiveling on the b9ti of the machine.

  A portion 85 of the machine housing (Figure 4) carries an articulated lever 87 and a turntable 89 provided with an eccentric crank pin connected to the hinged lever 87 by a rod 91. Another rod 92, connected to the free end articulated lever 87, is mounted on

  one end of the weft rod 21, by means of a

  which ensures alternating axial movements of the

  21, while allowing its pivoting.

  At the top of each of the two supports 13 and 15,

  a boss 93, 95 is provided. These two bosses

  are rigidly connected to each other by a rod

  97. The support 15 is fixed on an oscillating arm 99 (FIG.

gures 2 and 5), mounted on a bearing 101 of the part 103 of the frame, along an axis of parallel oscillation aiuttiges weft 19 and 21, and to the axis of oscillation 29 of the guiden

  weft yarn. In addition, in the middle position of the os arm

  99, the aforementioned axes and the axis of the bearing 101 are in a plane substantially parallel to that of the needles 3 * Greece at this coincidence, the rod

  frame 21 and the oscillation axis 29 of the thread guide

  move me alternately in a circular arc

  perpendicular to the needles 3. The os

  99 (FIG. 5) is controlled by a connecting rod 109 connected to the eccentric pin of a turntable 107,

on the part 105 of the building.

  The support 13 is secured to an oscillating arm 111, whose assembly is similar to that of the clever arm

  99, with which it is for example rigidly connected.

  The oscillating arm 111 can also be controlled by the

  off-center neton of a separate turntable.

  When the machine is running, the rotation of the eccentric crank pin plate 107 - as well as possibly

  the rotation of the separate turntable associated with the bone arm

  Separate glow 111 - control the reciprocating movements

  from top to bottom of the two supports 13 and 15, as already ex-

  1, ensuring the synchronism of these movements with those of the needles 3. Likewise, the eccentric crank plate 89 controls the reciprocating slips of the weft rod 21, the erisynchrony with

the movements of the needles.

  At the same time, the cam chain 81 is driven in a continuous movement under the action of the drum 83 or other similar actuating member. When a cam of the cam chain 81 thus acts on the oscillating arm 71, the latter pushes the return head 53 towards the cup

  (Figures 2 and 3). In this movement, the rod 61 articulates

  resting on the head 53 and the crankpin 51 actuates in turn, substantially indeformably, the sleeve

  intermediary 43 whose movement is communicated to the

  frame 21 carrying the wire guide 25, via

  transverse arms 45, 47, and connecting rod 49. Naturally, the driving of the cam sling 81 is ensured in such a way that the reciprocating movements of the weft guide 25 correspond

  each at a predetermined position of the crossing needles

chet 3.

  The two ball joints 63 and 65 of the connecting rod 61 are suitably arranged, as a function of the travel of the return head 53, and the length of the link 61 is chosen so that the tubular body 67 of the link remains oblique and offset. relative to the oscillation axis 29 of the weft thread guide, regardless of the position of the rod 61. This avoids any

dead point in this mechanism.

  Because the roller 77 bears on the flat face of

  head of return, which is parallel to the movement of the

  port 15, this last movement causes no axial displacement of the return head 53, and therefore no pivoting of the

  wire guide 25. The oscillations of the wire guide 25 pivoting

  in relation to axis 29 are therefore absolutely independent

  alternating movements of the support.

  However, it should be observed that it would be quite possible to otherwise achieve these mechanisms, without resorting to a return member, such as the head 53, slidably mounted parallel to the axis of oscillation 29, as it is will be described below, with reference to FIGS. 5 to 11, with regard to other exemplary embodiments. It would then be possible to associate with the rocker arm 71 (FIG. 2) a similar rocker arm, connected to the first by a rod with ball joints, and able to oscillate in a plane parallel to the axis of os-

  cillation 29 of the weft thread guide. This second rocker,

  connected to the crankpin 51 by the rod 61, would ensure

  time the function of the referral head. But the

  the weft guide would no longer be

  They are independent of the movements of the support. However, a detrimental arrangement of the various elements of the mechanism could make it possible to render negligible the secondary oscillations of the wire guide, induced by the movements of the

support.

  When it is desired to make a knitted band

  with points or fringes of various lengths

  As is already indicated with reference to FIG. 1, it is possible to control reciprocating slides of the weft rod 19 in various amplitudes, for example by means of a rotating cam, or a camshaft of different sizes.

  different heights. This chalne can for example be

  drum 83, already planned for the winding of the

cam chain 81.

  To control the alternating

  weft rods, and to control at the same time the bones

  of the weft rod 21 for passing the weft thread 35 into symmetrical loops (FIG.

  can also alternatively use cam chains dis-

  placed all in parallel on the same drum, as

  matted in Figure 6. For simplicity, we did not

  felt that a single weft rod 221 provided with a guide-

  wire 225, similar to the wire guide 25 of FIG. 1, and

  Like the latter to make the alternating symmetrical loops 39 of the weft thread 35o Like the weft rod 21, the rod 221 is mounted in two supports 213, 215, with respect to which it can move, under the action of two cam chains 281, 282, wound on a drum 283. The cam cat 281 controls a first rocker 271, associated with a return member 253 slidably mounted

  on a guide rod 243, parallel to the oscillation axis

  229 but excluded from this axis. Apart from this difference

  In fact, the rocker's movements are reflected in

  by oscillating movements of the thread guide 225 by

  port to the axis 229, similarly to the embodiment

  already described by way of example

  1 to 5. The rocker arm 272, associated with the cam chain 282 for controlling the sliding of the weft rod 221, acts to do this on a return head 254. The weft rod 221 is slidably integral with the head 254, but can rotate relative thereto. In addition, the return head 254 is locked in rotation by an auxiliary rod 256; and a return spring 258, mounted between an end ring of the rod

  weft 221 and a lug secured to the support 213,

  resuming the support of the rod head 221 against the cul-

  scorer 272, applying the latter on the chain

my 282.

  For a knitting machine with several

  weft stems, we can of course foresee other cat-

  cam followers wound on drum 283, to control

these stems.

  Schematically shown in Figure 7

  a variant of the machine with knitting hooks

  lons, which allows to voluntarily engage or not a thread of

  frame in the meshes of the chain columns. The provision

  provided for this purpose has hook needles

  403 and a plate 405, carrying wire guides-407. Cha-

  that needle 403 associated with a thread guide 407 makes it possible to

  knit a 411 mesh column. A guide-

  425 thread for the 435 weft thread is attached to a rod of

  frame 421, movable along an axis of sliding and os-

  429, under the action of a control mechanism similar to the mechanism already described in this suret about

  FIGS. 1 to 5. The weft thread 435 which passes into the guide

  de-fil 425 is also associated with a: tensioner 439, solici-

  by a spiral spring 443 mounted on an auxiliary shaft

re 441.

  When the device of FIG. 7 operates, the weft rod 421, controlled by an eccentric crank turntable, is driven by a reciprocating sliding movement perpendicular to the two stitching columns, so as to scroll the thread guide 425. in front of

  two columns, at the time of training-of each mail-

  411. For example, the weft rod 421 can be controlled by means of a camshaft-like camshaft 81 (FIG. 2) to move the rod from one position to another. In the first position, the wire guide 425 and the deframed wire 435 are in the position indicated in solid lines in FIG. 7. And in this case, the weft thread is incorporated into the

  mesh 411 of the two stitches, at each / new

  sliding of the wire guide 425, which thus disposes each time a section 437 of the weft thread between the

  two columns, to connect them to each other.

  But, on the other hand, when the wire guide 425 is in the oscillation position shown in solid lines, the sliding movement of the carrying rod

  421 makes it pass quite far in front of the columns of mail-

  the 411, and the weft thread 435 is no longer then

  engaged in the meshes. The tensioner 439 attracted by the

  in this case, spell 443 ensures the tension of the weft thread, by pulling it backwards during such an empty passage o

  the thread is entered by the thread guide, without being

pledged in the stitches.

  As can be seen from the explanation above,

  the thread guide is driven by an alternating movement of

  under the action of its control mechanism, and

  in a constant way, that the 435 weft thread is

  whether or not engaged in chain links 411. These cou-

  alternations, whose amplitude may be relative-

  important, occur at each cycle of operation.

  The oscillations which determine or not the engagement of the weft thread in the meshes of the chain columns are easy to control by means of a cam chain of relatively low height. If on the other hand we wanted to use a cam chain to control the alternating slides of the weft rod, we would have to

  cams of very great height, corresponding to the

  slid, and this would only allow one

low work speed.

  The knitted band shown in FIG. 8 consists of several columns of meshes formed side by side, namely two columns 501 and two columns 505, each comprising meshes 503 and 507. The two columns of each pair 501 and 505 are relatively

  close to each other, relative to the spacing

  parrying the two pairs. In the stitches 503 of the two columns 501, is knit one weft yarn 521, while another weft yarn 535 is likewise incorporated into the stitches 507 of the other two columns 505. From place to place, according to certain intervals. , elongate segments 539 of this second weft yarn 535 also pass through the meshes 503 of the two columns

  501, forming loops each consisting of two segments

  539, to connect the two columns 501 with the other two columns 505. Between the connecting loops, thus formed by elongate segments 539 of the left weft thread 535, in each column has a few stitches for which there is no cross connection between

the two pairs of columns.

  The band shown in FIG. 8 can be associated with other identical bands, to produce a blind with parallel slats, in which the slats are

  mounted between the link loops formed by the segments

  elongations 539 of the right weft thread.

  The band shown in FIG. 8 can be manufactured by means of a knitting machine.

  the stripes, including in particular a trico-

  the type of the device of Figure 7, but with four needles and an additional weft rod, each associated with a guide wire. The knitting of the left weft thread 521 is made by a thread guide similar to the thread guide 525 of FIG. 7, animated both by a

  alternating movement of sliding and oscillating motion

  lant, along the axis similar to the axis 429 of the stem

  Teuse. The sliding movements of this wire guide are carried out in a direction perpendicular to the columns of meshes, so as to pass each time in front of the

  four columns, at each formation of a row of mail-

  the. At the same time, the yarn guide associated with the weft yarn 535 is animated by an oscillating movement, such that the weft yarn 535 is engaged in all the stitches 507 of the two right-hand columns 505, but only in certain cases.

  some of the meshes 503 of the left-hand columns 501.

  FIG. 9 schematizes another

  knitting needle, having a row of hook needles 603, indicated only in part, and two supports 613, 615, similar to the supports 13 and 15 of Figure 5, and in which a plurality of weft rods can slide and oscillate from As shown above, for simplicity, only one weft rod 621 is shown, which can slide in the direction of its longitudinal axis 629, and oscillate with respect to this same

  axis. This rod 621 carries at least one wire guide 625.

  In the holder 615 is mounted a socket

  intermediate 643, which can pivot relative to the axis 629, without sliding. The weft rod 629 is slidably mounted inside the sleeve 643 of which

  one end, located to the left of the support 615, is solid

  The latter has a free end pierced with a hole for the passage of a branch of a cranked lever 6197 integral with the weft rod 621, and which can slide parallel to the axis 629, for securing in rotation the bushing 643 and the weft rod 621, allowing the sliding of the

stem 629.

  From the right side of the support 615, the bushing

  643 median is secured to a crank 651, whose arm therefore follows the rotational movement of the sleeve 643 relative to the oscillation axis 629, without power

  move in the axial direction. On the b9ti of the ma-

  china is mounted a rocker arm 671, the pivot of oscil-

  673 has an axis 675 perpendicular to the oscillation axis 629 of the weft rod 621. The rocker arm

246 10 49

  671 carries a bearing roller 679, applied by a return spring 657 to a cam of a rotating shaft 683, axis 685 perpendicular to the axis of oscillation 629 of the weft rod. A rigid connecting rod 661 is mounted by a ball joint 663, on the end of the crank 651, and by another articulation

  ball 665 on one end of the rocker arm 671.

  When this mechanism of FIG. 9 operates, the rocker arm 671, actuated by the cams of the shaft 683 which rotates in a continuous movement about its axis 685, is driven in an oscillatory movement with respect to its axis 675. These oscillations of the rocker arm 671 are transmitted to the crank 651 by the rod 661, to control the oscillations of the weft rod 621, and the wire guide 625 carried by this rod, relative to 1 '

  axis of oscillation 629. In addition, a mechanism for

  alternatively 691 at the same time commands an alternating sliding movement of the weft rod 621, in

the direction of the oscillation axis 629.

  In FIGS. 10 and 11, there is shown

  basically a hook needle machine, for

  dimensioning strips, having hook needles 703 and two supports 713 and 715. A weft rod 719 having an axis 729, bearing at least one return hook 723 for a weft thread 735, is pivotally mounted in the supports 713, 715, but not slidable. OF

  on the other hand, two other frame rods 721, 722,

  each at least one wire guide 725_727 is slidably mounted in both supports parallel to the axis

  oscillation 729 of the first rod.

  A rotating drum 783 is mounted on the frame

  of the machine, along an axis of rotation 785 perpendicular

  701 of the first weft rod 719. On the drum 783-wind a yoke 781 provided with cams 781a, to control the weft rod 719, and another chain 793 provided with cams. 793a, for

  order one of the other frame rods 721.

  A fixed shaft 773 mounted in the frame of the machine

  China has a perpendicular longitudinal axis 775

  to the oscillation axis 729 of the weft rod 719 (FIG.

  11), and serves as a pivot for a transverse lever

  oscillating 771, provided with a supporting roller 779 which cooperates

  father with the camshaft 781. The swing lever 771

  controls an end crank 751 of the work stem.

  oscillating 719, via a link 761, having a ball joint 763, 765, to

each of its ends.

  Another swing lever 785 mounted on the arm

  The fixed beam 723 carries on one side a support roller 787, which cooperates with a second cam chain 793, and on the other side another support roller 789, applied at the end.

  on one end of the sliding weft rod 721.

  The system further comprises a return spring (not re-

  presented), similar to the spring 657 of Figure 9, and associated with the first swing lever 771, as well as another return spring associated with the sliding rod 721, to put it in abutment against the other oscillating lever 785. As already , exposed in connection with FIG. 4, the sliding weft rod 722 is furthermore controlled by a mechanism with alternating movement, comprising by

  example an eccentric crank turntable.

  The two supports 713, 715 are mounted manually.

  oscillating on the frame of the machine, along an axis 797 (Figure 11) and are controlled by a mechanism, similar to that of Figure 5, which communicates an alternating movement up and down in synchronism with

  the movement of the needles back and forth.

  When operating the machine shown schematically in Figures 10 and 11, the warp threads 709 serve to form stitch columns. To do this, the two weft rods 721, 722 are driven by an alternating sliding movement, such that each of their son-guides engages a weft thread 733, 735 in the stitches. But the sliding amplitude of the weft rod 722 is greater than that of the rod 721. The claw 723

  return of the weft thread 735 can be animated by a

  oscillation, with respect to the pivot axis 729, under the action of the cam slider 781, which controls the

  return claw 723 via the oscillating lever

  771 and link 761. For example, if the cat-

  No. 781 comprises a cam causing pivoting of the claw 723, when the thread guide 727 is to the left of the claw 723, the latter can take the weft thread 735 and retain it, to form with this thread a loop

  737, protruding on an edge of the knitted band

  bricked by the machine. Following the various oscillations

  possible of the return claw 723, slaved to the chai

  cams 781, this shoe can be used to

  to make such loops 737 with each movement of

  and-comes from the 727 thread guide, or only for unkartie

  back-and-forth movements of this thread guide.

  In the two devices shown in FIGS. 9 to 11, the rocker arm 671 and the swing lever

  771 each constitute a movement transmission organ.

  driven by camshaft 683 or

  mes 781, and oscillating in a plane passing through the oscillation axis 629, 729, of the associated weft rod. These alternating movements of the rocker or the oscillating lever in question are translated into alternate pivoting of the

  associated weft rod 621, 721, by the tie rod of

  its 661, 761. In addition, as already indicated, the supports

  613, 615, or 713, 715, are animated by a movement of

  back and forth along a parallel oscillation axis

to the weft stems.

  - So that these alternate movements of the supports

  713, 715, cause on the weft rod 719

  induced reductions as small as possible, and even

  zero, the ball joints 763, 765, of the

  link 761 (FIG. 11) are arranged in such a way that

  that their centers pass simultaneously, for a given position of link 761, in a plane which

  contains the oscillation axis 797 of the supports. In-

  the tubular body of the connecting rod 761, aligned

  the centers of the articulated joints, is oblique and de-

  wedged relative to the oscillation axis 729 of the rod of

  frame. A similar provision is provided for

  ball joints 663, 665 of link 661 of the

figure 9.

  We will now briefly describe some -

  other variants of the machine according to the invention.

  Of course, it is possible to combine one with

  in many ways, the different modes of

  described in this / presentation, as well as the

corresponding processes.

  In particular, it is possible to provide a knitting machine comprising a greater or lesser number

  weft stems and wire guides or feed claws

  attached to these stems, depending on the patterns of the bands

  knitted to make. In addition, one can realize

  alternatively, the alternating movements of the weft stems, according to the desired amplitude for these alternating movements of the stems, and according to the kind of knitting band, in particular using rod-and-crank or revolving-rod controls for this purpose; ,

  or with cam chain These control mechanisms, by biel-

  and crank or cams, constitute both the actuating members of the movable rods, and the support

  equipment of the programs established to achieve a

  predetermined number of successive movements of these

  ges. Using on a cat or on a tree

  turning profiled bosses into cams of various

  tors, or with grooved profiled trays.

  respondent, we can easily knit a patterned strip

  varied, by varying the amplitude of the

  alternating each weft rod, according to a predetermined program. In the embodiments which have just been described by way of example, the movable rods are controlled by means of a rod, comprising a ball joint at each end.

  we could obviously replace each of these articula-

  ball bearings in the same way, allowing angular deflection of a certain

  amplitude, with several degrees of freedom. We could also

  if, instead of ball joints, use articulated joints each formed of two pivoting parts of different axes, either crossed as in a universal joint, or oblique and offset with respect to each other. But in the latter case, it requires a reduced gap between the two pivot axes of the articulated joint m4ie, because this gap must be less than the length of the link, or more precisely less than the distance between the two extremities joints this link. Preferably, these two joints, or more precisely their centers, must be on an oblique line

  and offset from the oscillation axis of the guide-

  son. The center of a joint is defined by the point in the middle of the shortest straight segment connecting the two relative pivot axes

to the same articulation.

Claims (12)

REVENDICATICNS   1. Apparatus for a machine for manufacturing two-dimensional textile articles, such as a weft knitting machine, or a machine for crocheting knitting hooks, which device comprises at least one thread guide (25,225,425,625) or a return member (723) for a weft yarn, and actuating means for imparting oscillating movements to the aforesaid members with respect to an oscillation axis (29,229,429, 629,729), via a return member of   movement (53,253, 671,771) movable in a parallel plane   is aligned with the oscillation axis (29,229,429,629,729), and a crank (51,651,751) pivotable relative to the oscillation axis (29,229,429,629,729) but slidably locked in the direction of this axis; * anivelle being connected to the guide wire (25,225,425,625) and the return member (723) of the weft yarn; this device being characterized in that the movement return member (53,253,671,771) is connected by a deformable hinge (65, ... 665,765) / several axes to a connecting rod   transmission (61,661,761) itself connected to the   (51,651,751) by another articulation (63,663,763) deformable along several axes; and in that the two joints (63,65) define a line (67) oblique and offset with respect to the axis of oscillation   (29,229,629,729); so that the transmission rod   mission (61,661i761) turns into alternate pivoting   crank (51,651,751) the movements of va-et-   comes from the motion return member (53,253,671,   771), when the device is running on the machine.   - 2. Device according to claim 1, characterized in that the two joints each comprise a pivot member for an angular movement along several axes, such as a ball joint or a   ball bearing with several degrees of freedom.   3. Device according to one of claims 1 or 2,   characterized in that the transmission member of movement   (53,253) are slidably arranged in the direction of the oscillation axis (29, 229), being pivotally locked relative to this axis.   4. Device according to claim 3, characterized   in that the yarn guide (25,225) and the return member (723) of the weft yarn are mounted on at least one movable support (13,15) to have a perpendicular movement   to the axis of oscillation (29,229), and in that the movements   sliding parts of the transmission member of   (53,253) are controlled by an intermediate oscillating member (71, 271) resting on one side of the body   transmission (53,253) perpendicular to the axis of oscillation tion (29,229).   5. Device according to one of claims 1 to 4,   characterized in that it comprises an oscillating element (71,271,671,771) integral with the frame of the machine, along a pivot axis (675,775) perpendicular to the axis of oscillation (29,229,629,729) of the wire guide (25,225,425,625). and the return member (723) of the weft yarn, and in that said oscillating member (71, 271, 671, 711) is associated with the motion transmitting member   (53,253), or confused with this organ.   6. Device according to claim 5, characterized in that, in addition to the aforesaid oscillating element (271,771), it comprises at least one other oscillating element (272,785) mounted on the same axis (675,775), for actuating a rod   weft (221,721) and that the elements   oscillations (271,272,771,785) are themselves   ordered by organs at-cames (281,282,781,793),   pivotally on a common axis (785).   7. Device according to one of claims 1 to 6,   characterized in that the wire guide (25,225,425,625) and the weft return member (723) are mounted on   a weft rod (21,221,421,621,719), mounted manually   movable in supports (13,15,213,215,613,615, 713,715) and integral in rotation with the crank (51, 651.751).   8. Device according to claim 7, characterized   sd in that the yarn guide (25,225,625), the weft tower member (723) and the weft rod (21,221,621) are slidable in the direction of the aforesaid rod,   in relation to laananivelle (51,651).   9. Device according to claim 8, characterized in that the crank (51) is rigidly connected to a sleeve (43) pivotally shown in a support (15), and in which is slidably mounted the rod of   frame (21); in that the weft rod (21) and the sleeve   (43) are each integral in rotation of an arm   transversely (45,47) and in that the two trans-   versaux (45,47) are connected to each other by a rod (49), parallel to the weft rod (21), so as to slide in the direction of the axis of the weft rod (21) without being able to rotate,   10. Machine for making textile articles   two-dimensional, such as a knitting machine in weft, or a machine Crochet knitting hooks,   characterized in that it comprises a trimming device   rating according to one of claims 1 to 9.   1It is a method for controlling a device according to   claim 1, communicating movements   oscillating with a wire guide (25,225,425,625) or a return member (723) for a weft thread, -characterized by controlling the oscillating movement of the wire guide (25,225,425,625) and the return (723) of the weft yarn via a transmission member of   motion (53,253,671,771), moving in a parallel plane   at the axis of oscillation, (29,229,429,629,729); the or-   movement transmission system (53,253,671,771)   thereby providing a connecting rod (61,661,761) to which it is associated by a hinge (63,663,763) deformable along several axes; and this connecting link being itself associated, by a   other articulation (63,663,763) deformable according to   two axes, with an oscillating crank (51,651,751) so-   lidar rotation of the wire guide (25,225,425,625) and the return member (723) of the weft thread, but which can   slide axially relative to these bodies.   12. Process according to claim 10, characterized   ern that a sliding movement of alternating   born at the wire guide (25,225,425,625), in the direction of the axis   oscillation (29,229,429,629) of cguguide-wire.   13. Method according to one of claims 10 or 11,   characterized in that a weft thread (35,735) is passed through the stitches of a knit by means of a thread guide (25,225,625,727), and in that loops are formed with   the weft thread (35,735), by alternately   The yarn guide (25,225,625) or a return member (723) of the weft yarn is wound around the yarn or yarn guide so as to produce fringes.   or points on the edge of the knit.   14. Method according to one of claims 12 or 13,   characterized in that knit stitches   (501,505) arranged in such a way that   the wire guide (425) of alternating movements of   with respect to the axis of oscillation (429) and alternating sliding movements along the same axis, so as to engage a weft thread (435,535) in the   mesh (411,503,507), in a direction transverse to the co-   in the first pivoting position of the thread guide (425), and so as to pass the weft thread (435,535) in front of the stitches (411, 503,507), without engaging it in these here, in another   pivoting position of the thread guide (425).